diff --git a/x-ui.sh b/x-ui.sh
index 7e9a4826..dfb2653e 100644
--- a/x-ui.sh
+++ b/x-ui.sh
@@ -43,8 +43,8 @@ if [[ "${release}" == "centos" ]]; then
         echo -e "${red} Please use CentOS 8 or higher ${plain}\n" && exit 1
     fi
 elif [[ "${release}" == "ubuntu" ]]; then
-    if [[ ${os_version} -lt 20 ]]; then
-        echo -e "${red}please use Ubuntu 20 or higher version! ${plain}\n" && exit 1
+    if [[ ${os_version} -lt 18 ]]; then
+        echo -e "${red}please use Ubuntu 18 or higher version! ${plain}\n" && exit 1
     fi
 elif [[ "${release}" == "fedora" ]]; then
     if [[ ${os_version} -lt 36 ]]; then